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Synthesis, assembly and device of 1-dimentional nanostructures

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Chinese Science Bulletin 2002年第14期47卷 1149-1156页

作者： Yajie dong Yadong Li Tsing Hua Univ Dept Chem Minist Educ Key Lab Atom & Mol Nanosci Beijing 100084 Peoples R China

Synthesis and assembly of 1-dimentional (1-d) nanostructures and measurement of their electrical and optical properties are very important in fabrication of nanode-vices. Recent developments in this field are summarized in this review. The assembling methods can be divided into two classes: assembly using macroscopic field forces and micro-fluidic-assisted-template-integration. The former can assemble nanowires by controlling direction and intensity of electric or magnetic field, while the latter represents a general assembly strategy for any kind of 1-d nanostructures. The assembly of 1-d nanostructures will make it possible to fabricate nanosensors, nanolasers and nanoscale logic gate circuits for computation.

关键词： 1-d nanostructures synthesis assembly measurement of physical properties nanodevice.

1-d directional Filter Based Texture descriptor in Fractional Fourier domain

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 125-128页

作者： Kai Tian Hongzhang Jin Liying Zheng College of Automation Harbin Engineering University College of Computer Science and Technology Harbin Engineering University

Texture analysis is a fundamental field in computer vision. However,it is also a particularly difficult problem for no universal mathematical model of real world textures. By extending a new application of the fractional Fourier transform( Fr FT) in the field of texture analysis,this paper proposes an Fr FT-based method for describing textures. Firstly,based on the Radon-Wigner transform,1-d directional Fr FT filters are designed to two types of texture features,i. e.,the coarseness and directionality. Then,the frequencies with maximum and median amplitudes of the Fr FT of the input signal are regarded as the output of the 1-d directional Fr FT filter. Finally,the mean and the standard deviation are used to compose of the feature vector. Compared to the Wd-based method,three benefits can be achieved with the proposed Fr FT-based method,i. e.,less memory size,lower computational load,and less disturbed by the cross-terms. The proposed method has been tested on16 standard texture images. The experimental results show that the proposed method is superior to the popular Gabor filtering-based method.

关键词： fractional Fourier transform texture analysis Radon-Wigner transform 1-d directional window

Experiments on Exploration of Shallow Fine Structures and the Construction of the 1-d Velocity Model in the Pingtan Island,Fujian

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Earthquake Research in China 2019年第2期33卷 265-275页

作者： GUO Yang XU Jiajun LIN Chen JIN Xing YAO Huajian YANG Hongfeng CAI Huiteng Fujian Earthquake Agency Fuzhou 350003China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China School of Earth Sciences and Engineering Nanjing UniversityNanjing 210046China Earth System Science Programme Faculty of ScienceThe Chinese University of Hong KongHong Kong 999077China

112 short-period seismographs were set up in the 400 km^2 area of Pingtan Island and its surrounding areas in Fujian.The combined observations of the airgun source and ambient noise source were carried out using a dense array to receive the 387 airgun signals excited around the island and one month of continuous ambient noise recording.The 1-d P-wave and S-wave shallow velocity model of Pingtan Island is obtained by the inversion of the airgun body wave’s first arrival time data,and the reliability of the velocity model is verified by using the surface wave phase velocity dispersion curve,which can provide initial model for subsequent 3-d imaging.The experimental results show that this experiment is a successful demonstration of local scale green non-destructive detection,which can provide basic data for shallow surface structure research and strong vibration simulation of the Pingtan Island.

关键词： Pingtan Island Fujian dense array Airgun Ambient noise 1-d velocity model

dynamics of 1-d Electron Motion under a Periodic Electric Field with Radiation Reaction Effect

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Journal of Applied Mathematics and Physics 2020年第5期8卷 814-820页

作者： Gustavo V. López Jorge Lizarraga departamento de Física Universidad de Guadalajara Blvd. Marcelino García Barragan y Calzada Olímpica Guadalajara Jalisco Mexico

We consider the 1-d motion of an electron under a periodic force and take into account the effect of radiation reaction dissipation force on its motion, using the formulation of novel radiation reaction force as a function of the external force expression. Two cases are considered: a simple sinusoidal time depending force, and sinusoidal electromagnetic force with position and time dependence. The purpose of the study of these cases is to bring about a way to find an experimental study to determine the validity of this novel approach for the radiation reaction force. We found that the difference of the normalized (with respect the speed of light) velocities, with and without radiation reaction, is quite small between 10-31 to 10-14 for intensities on the electric field of 10-8 to 1 dynes/ues, which may represent some concern to measure experimentally.

关键词： Radiation Reaction Force 1-d Electron Motion damping Motion

基于Loeffler算法的2-d dCT IP软核设计

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微电子学与计算机 2011年第2期28卷 136-139,144页

作者：郭宝增牛力刘志明河北大学电子信息工程学院河北保定071002

提出一种基于Loeffler算法的2-d dCT IP软核设计方法.用移位和加法运算代替乘法运算.为减少芯片占用面积,对乘法系数采用CSd编码,1-d dCT复用技术;为提高电路的速度,采用流水线结构,优化转置矩阵.基于上述算法,设计了用Verilog HdL语言... 详细信息

提出一种基于Loeffler算法的2-d dCT IP软核设计方法.用移位和加法运算代替乘法运算.为减少芯片占用面积,对乘法系数采用CSd编码,1-d dCT复用技术;为提高电路的速度,采用流水线结构,优化转置矩阵.基于上述算法,设计了用Verilog HdL语言描述的IP软核.对软核进行了编译、综合、布局布线和后仿真,验证了算法的正确性.实验结果显示最高工作频率可以达到139.43MHz,能够满足视频图像压缩的实时性要求.

关键词： 1-d dCT Loeffler算法 IP核图像压缩

A SOLITARY SOLUTION ANd ITS STABILITY IN A 1-d FHN EQUATION

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Journal of Shanghai Jiaotong university(Science) 1996年第2期1卷 17-20,24页

作者： Gu Shengshi(dept. of Applied Mathematics, Shanghai Jiaotong University)A. V. Holden Zhang Henggui(dept. of Physiology & Centre for Non-linear Studies, Leeds University, Leeds, LS2 9JT,England)

The analytic solutions in a 1-d FitzHugh-Nagumo model are offered,and a function of wave speed cwith parameters ε,γ,β and d1 has been derived. In the parameter space (ε,β),the conditions for the assumed periodic ... 详细信息

关键词： solitary wave excitable media nonlinear wave process 1-d FitzHugh-Nagumo equations

左旋甲基色氨酸在小鼠母胎界面诱发免疫耐受失衡

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细胞与分子免疫学杂志 2014年第1期30卷 4-7页

作者：王欢华王晨虹南方医科大学附属深圳妇幼保健院妇产科广东深圳518028

目的探讨是左旋-1-甲基色氨酸(1-L-MT)还是右旋-1-甲基色氨酸(1-d-MT)在小鼠母胎界面诱发母胎免疫耐受失衡。方法雌性BALB/c小鼠与雄性C57BL/6J小鼠交配后,自妊娠第6.5天起分别给予1-L-MT、1-d-MT、有机溶剂,共10 d,于妊娠第16.5天处死... 详细信息

目的探讨是左旋-1-甲基色氨酸(1-L-MT)还是右旋-1-甲基色氨酸(1-d-MT)在小鼠母胎界面诱发母胎免疫耐受失衡。方法雌性BALB/c小鼠与雄性C57BL/6J小鼠交配后,自妊娠第6.5天起分别给予1-L-MT、1-d-MT、有机溶剂,共10 d,于妊娠第16.5天处死孕鼠,应用高效液相色谱法检测胎盘组织中哚胺2,3-二氧化酶(IdO)活性,流式细胞技术检测蜕膜组织中IFN-γ/IL-4比率,并对比妊娠结局。结果 1-L-MT给药组胎盘组织中IdO活性明显低于1-d-MT组及对照组,而1-d-MT组与对照组间无统计学差异;蜕膜组织中IFN-γ/IL-4比率高于1-d-MT组及对照组,而1-d-MT组与对照组间无统计学差异;胎鼠数量及体质量明显低于1-d-MT组及对照组,而1-d-MT组与对照组间无统计学差异。结论 1-L-MT而非1-d-MT通过抑制IdO活性在小鼠母胎界面诱发母胎免疫耐受失衡。

关键词： IdO 妊娠免疫耐受 1-d MT 1-L-MT 小鼠